ujoint bolt torque?
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Joined: Jul 2004
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ujoint bolt torque?
Ok. we replaced the u-joints and the driveshaft was bent. They resleeved it and it got a new yoke. The u-bolts that retain the u-joints were torqued to 4 ftlbs per a tech at a shop in Vegas that we called. My son drove it to work (4 mi) and got there and halfway back. The bolts loosened enough to let the caps slip out and the front ujoint drop to the road. He is alive and the truck was not wrecked. I nearly kicked his butt for the extra miles before rechecking the bolts. We were planning to use locktite when rechecking them. Now we get to take the driveshaft back again. It could have been worse.
Now the question.. Is 4ftlbs. correct? It seemed like not enough but I did not want to crush the bearings and so we did what the tech told us.
Now the question.. Is 4ftlbs. correct? It seemed like not enough but I did not want to crush the bearings and so we did what the tech told us.
Tuned
Joined: Dec 2001
Posts: 431
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From: Saskatoon sk
The correct torque for drive shaft to rear yoke is 90 to 110 ft lbs. I think I could put 4lbs torque using my fingers 
transfer case bolts is 20-28 ft lbs. to put it into prospective a drain plug torque is 15 to 25 ft lbs so 4lbs is way off.
transfer case bolts is 20-28 ft lbs. to put it into prospective a drain plug torque is 15 to 25 ft lbs so 4lbs is way off.
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O.k. We took the driveshaft back to the rebuild shop. They said that the bolts should only be tight enough to flatten the lock washers. They also said that straps can be tightened down but never u-bolts because they crush the u-joints.
Hotshot
Joined: Feb 2004
Posts: 11,697
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From: Marengo, Iowa
Hadn't heard that one, I would say it is practically impossible to crush the cap, squeeze maybe, but not crush, as it is supported by the yoke, and also the needle bearings will keep it from truthfully crushing. Not to mention the majority of the pressure is on the outside edge, where the metal cap is continous.
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